7. If this is going to be a fair test, what variables should they control?
A. Amount of water and sugar in each cup, method of stirring, time when the solid is added to water, how long each solution is stirred
B. Amount of water and sugar in each cup, method of stirring, how long each solution stirred.
C. Amount of sugar in each cup; method of stirring, time when the solid is added to wate how long each solution stirred.
D. Amount of water in each cup, method of stirring, time when the solid is added to wate how long each solution is stirred. 8. What is the dependent variable (what is being measured)?
l. The temperature of water.
Il. The amount of sugar.
III. The length of time that sugar completely dissolves in hot water.
IV. The length of time that sugar completely dissolves in cold water.
A. l only
B. ll only
C.ll and lll
D.lll and lV​